Ball-bearing mounting.



.H. HESS. BALL-BEARING MOUNTING.

uruozmon rum) 11.24, 1906.

989,258, Patented Apr. 11,1911.

WITNESSES I INVENTOR UNITED STATES PATENT OFFICE.

HE1\TBY HESS, OF PHILADELPHIA, PENNSYLVANIA.-

BALL-BEARING MOUNTING.

Specification of Letters Patent.-

Patent-ed Apr. 11, 1911.

Application filed April 24, 1906. Serial No. 313,444.

To all whom it may concern:

Be it known. that I, HENRY Hnss, a citizen of the United States, and resident of Philadelphia, in the State: of Pennsylvania,

as possible, and it is therefore desirable to provide means for taking u this radial play n ball bearings when use in such mount- 111 's.

I/Iy invention relates to means for taking upsuch radial play.

In the accompanyin drawing, which illustrates an exempli ying structure in which my invention is embodied, Figure 1 is a vertical longitudinal section of the mounting of a spindle for an internal grinder; and Fig. 2 is an enlarged section through the two race-rings of one ball bearing.

In the exemplification I show my invena tion as applied to the mounting of an internal-grinder spindle, in which steady and true rotation is highly important. The'special application of the invention is, how-' ever, obviously non-essential.

1 is a rotative spindle; 2, a casting, forming a support for the spindle; 3, 4, journal boxes, in the present instance integral with casting 2; 5, a complete ball bearing, generally of the non-adjustable ring type, of which the inner race-ring 6 encircles the spindle 1 and is secured against a shoulder thereon by a nut 7, and the outer race-ring 8 rests in a suitable socket formed in box 3, and is there secured by a nut 9; 10, another similarball bearing, of which .the inner rin 11, encircles the s indle and is secure against a shoulder t ereon by a nut 12, and

the outer rin 13 rests in a cylindrical bore in box ,4, an is free to move therein longitudinally of the s indle; 14, a spring, conveniently of helica form, of which one end bears against the outer bearing ring 13, and the other end against a nut 15, by which the said spring is retained within box, 4, and forced against the bearing ring 13;'17, a

drivin pulley; secured to the spindle; and

18, a s oulder and screw-thread on the s indle for attachin thereto a grinding too The ball bearings usedmay be assembled by the eccentric displacement method or any other suitable way.

As seen clearly in Fig. 2, the ball races of the two bearings have in cross-section the shape of an arc of a circle, so that, if for any reason the balls run loosely in their normal path in the races-that is, in a plane intersecting the greatest radial diameter of the outer race and the least radial diameter of the inner race -movement of one of the race-rings longitudinally of its axis in relation to the other will cause the balls to run in parts of the races which provide a smaller path for the balls, and therefore any radial play is taken up.

In Fig. 1, the pressure of spring 14 against the outer bearin ring 13 urges the inner ring 11 and spin le 1 toward the right. The inner ring 6 of the other bearing thereupon tends to move to the right, until stopped by the balls, which engage also the outer, fixed bearing ring 8. The balls in the two bearings are thus always urged to follow a path inthe races smaller than the ordinary, normal ball-contact points, and any tendency to radial play, however caused, is perfectly taken up. The present invention is susceptible to many variations. 1

The separate boxes for supporting the two bearings are rovided in the present exemplification on y in order to allow placing the pulley 17 between the bearings; in many cases the mountings for' the two bearings maybe much more closely related, or in fact, practically one structure.

What I claim is:

1. The combination of a rotary shaft, a stationary support, two non-adjustable ball bearings each comprising an inner and an outer bearing ring provided with radiallyopposite races of curved cross-section, and means acting upon the sup ort and a bearing member to maintain t e shaft in true rotative alinement. Y

2. The combination of a shaft, a housing, a non-adjustable ba'll bearin comprisin an inner bearing ring fast on t e shaft, an an outer bearing ring fast in the housing, a second non-adjustable ball bearing comprising an inner bearing ring fast on the shaft and an outer bearing ring loose in the housing, the two rings of each of the ballbearings being provided with radially ifpposite races of curved cross-section an abutment in the housing, and a spring compressed :between the abutment and the loose bearing lll'l 3% The combination of a shaft, a housing, a non-adjustable ball bearing comprisin an inner bearing ring fast on the shaft am an outer bearing ring fast in the housing, a sec-f ond non-adjustable ball bearing 'comprisin an inner bearing ring -fast on the shaft an housing, and a drive pulley on the shaft between the bearings. I

In testimony whereof I have aflixecl my signature in the presence of two witnesses.

HENRY HESS. Witnesses THEO. H. MGCALLA, C. H. MCCALLA. 

